The message
from "mrcheerful
." contains these words:

So my guess is it would be a hard way to get a living.

One of the teaching assistants at the kids' school does their PAT
testing. Turned out to be cheaper than outsourcing it - she's
appropriately qualified and IIRC uses suitably calibrated equipment
loaned as a favour to the school by someone.

--
Skipweasel
Pay no attention to that man behind the curtain.